JP6282208B2 - Outdoor unit and air conditioner - Google Patents

Outdoor unit and air conditioner Download PDF

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Publication number
JP6282208B2
JP6282208B2 JP2014196963A JP2014196963A JP6282208B2 JP 6282208 B2 JP6282208 B2 JP 6282208B2 JP 2014196963 A JP2014196963 A JP 2014196963A JP 2014196963 A JP2014196963 A JP 2014196963A JP 6282208 B2 JP6282208 B2 JP 6282208B2
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outdoor
unit
outdoor fan
temperature
fan
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JP2016070519A (en
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成雄 梅原
成雄 梅原
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2014196963A priority Critical patent/JP6282208B2/en
Priority to US14/845,330 priority patent/US10145596B2/en
Priority to EP15183985.9A priority patent/EP3001114B1/en
Priority to CN201510598300.9A priority patent/CN105465909B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/40—Vibration or noise prevention at outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/37—Resuming operation, e.g. after power outages; Emergency starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56—Remote control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Description

本発明は、室外ファンを有する室外機および空気調和装置に関する。   The present invention relates to an outdoor unit having an outdoor fan and an air conditioner.

従来の空気調和装置は、空気調和装置の運転を停止した時に、電装部品を冷却するため、一定時間室外機のファンを駆動させ、電装部品の温度が設定値以下の場合は、室外ファンの回転数を低下させるまたは室外ファンを停止させる。これにより、空気調和装置の運転停止後における電装部品の冷却を低騒音で行うことができる。例えば、下記特許文献１を参照されたい。   The conventional air conditioner drives the fan of the outdoor unit for a certain period of time to cool the electrical components when the operation of the air conditioner is stopped. When the temperature of the electrical components is below the set value, the outdoor fan rotates. Reduce the number or stop the outdoor fan. Thereby, the electrical component can be cooled with low noise after the operation of the air conditioner is stopped. For example, see Patent Document 1 below.

特開平６−２６５１９９号公報JP-A-6-265199

上述した従来の空気調和装置は、空気調和装置の運転停止後、一定時間室外ファンの運転を続行させ、電装部品の温度が設定値以下の場合は室外ファンの回転数を低下させるまたは停止させている。しかしながら、室外ファン運転中と室外ファン停止中とで、電装部品の温度の変化の様子が異なる。このため、電装部品の温度が設定値以下であっても、室外ファンの運転を継続する必要がある場合もある。   In the conventional air conditioner described above, the operation of the outdoor fan is continued for a certain period of time after the operation of the air conditioner is stopped, and the rotation speed of the outdoor fan is decreased or stopped when the temperature of the electrical component is below the set value. Yes. However, the state of changes in the temperature of the electrical components differs between when the outdoor fan is operating and when the outdoor fan is stopped. For this reason, it may be necessary to continue the operation of the outdoor fan even if the temperature of the electrical component is equal to or lower than the set value.

例えば、空気調和装置が、ワイドバンドギャップ半導体またはリアクタのように許容温度が１５０℃を超える高耐熱の電装部品と、電解コンデンサのように許容温度が８５℃以下の低耐熱の電装部品とを両方備えているとする。室外ファンが運転中は、空気が循環しているため、高耐熱の電装部品から低耐熱の電装部品へ熱が伝わりづらいが、室外ファンが停止すると、空気の循環が停止し、高耐熱の電装部品から低耐熱の電装部品へと熱が伝わり、低耐熱の電装部品の温度が許容温度を超えてしまう恐れがある。   For example, an air conditioner is equipped with both a high heat resistant electrical component with an allowable temperature exceeding 150 ° C. such as a wide band gap semiconductor or a reactor, and a low heat resistant electrical component with an allowable temperature of 85 ° C. or less such as an electrolytic capacitor. Suppose you have it. While the outdoor fan is in operation, air circulates, making it difficult for heat to be transferred from the high heat resistant electrical components to the low heat resistant electrical components, but when the outdoor fan stops, the air circulation stops and the high heat resistant electrical components Heat may be transferred from the component to the low heat resistant electrical component, and the temperature of the low heat resistant electrical component may exceed the allowable temperature.

また、空気調和装置の運転停止後、一定時間室外ファンの運転を続行させると、空気調和装置としての運転停止中であるにも関わらず電力を消費することになる。   In addition, if the outdoor fan continues to operate for a certain period of time after the operation of the air conditioner is stopped, power is consumed even though the operation as the air conditioner is stopped.

本発明は、上記に鑑みてなされたものであって、消費電力を抑えつつ電装部品の温度の上昇を抑制することができる室外機を得ることを目的とする。   This invention is made | formed in view of the above, Comprising: It aims at obtaining the outdoor unit which can suppress the raise of the temperature of an electrical component, suppressing power consumption.

上述した課題を解決し、目的を達成するために、本発明は、圧縮機、室外ファンおよび室外制御基板を備えた空気調和装置の室外機であって、前記圧縮機および前記室外ファンを制御する制御部と、前記室外制御基板に実装された電装部品の周囲の温度を検出する温度検出部と、電源電圧を検出する電源電圧検出部と、を備え、前記制御部は、前記電源電圧検出部が検出した電源電圧に基づいて電源の供給が停止していると判断した場合、前記圧縮機および前記室外ファンを停止させ、前記温度検出部により検出された温度が閾値以上であるか否かを判断し、前記温度検出部により検出された温度が閾値以上であると判断すると、前記圧縮機を運転させている場合の前記室外ファンの回転数より低い回転数である保護回転数で前記室外ファンを動作させることにより空気を循環させて前記室外制御基板を冷却することを特徴とする。 In order to solve the above-described problems and achieve the object, the present invention is an outdoor unit of an air conditioner including a compressor, an outdoor fan, and an outdoor control board, and controls the compressor and the outdoor fan. A control unit; a temperature detection unit that detects a temperature around an electrical component mounted on the outdoor control board; and a power supply voltage detection unit that detects a power supply voltage. The control unit includes the power supply voltage detection unit. When it is determined that the supply of power is stopped based on the detected power supply voltage, the compressor and the outdoor fan are stopped, and whether or not the temperature detected by the temperature detection unit is equal to or higher than a threshold value. determination, and the detected temperature portion temperature detected by is determined to be equal to or larger than the threshold value, the outdoor fan with a protective rotational speed which is lower than the rotational speed rotational speed of the outdoor fan when you are allowed to operate the compressor Air circulation by operating, characterized in that cooling the outdoor control board.

本発明によれば、消費電力を抑えつつ電装部品の温度の上昇を抑制することができるという効果を奏する。   According to the present invention, it is possible to suppress an increase in the temperature of the electrical component while suppressing power consumption.

実施の形態１にかかる空気調和装置の構成例を示す図The figure which shows the structural example of the air conditioning apparatus concerning Embodiment 1. FIG. 実施の形態１の空気調和装置の室外機の断面の一例を示す概念図The conceptual diagram which shows an example of the cross section of the outdoor unit of the air conditioning apparatus of Embodiment 1. 実施の形態１の空気調和装置における室外ファンの制御手順の一例を示すフローチャートThe flowchart which shows an example of the control procedure of the outdoor fan in the air conditioning apparatus of Embodiment 1. 実施の形態１の室外ファンの回転数の推移の一例を示す図The figure which shows an example of transition of the rotation speed of the outdoor fan of Embodiment 1 実施の形態２にかかる空気調和装置の構成例を示す図The figure which shows the structural example of the air conditioning apparatus concerning Embodiment 2. FIG. 実施の形態２の停電割り込み処理手順の一例を示すフローチャートThe flowchart which shows an example of the power failure interruption processing procedure of Embodiment 2 実施の形態３にかかる空気調和装置の構成例を示す図The figure which shows the structural example of the air conditioning apparatus concerning Embodiment 3. FIG. 実施の形態３の空気調和装置における室外ファンの制御手順の一例を示すフローチャートThe flowchart which shows an example of the control procedure of the outdoor fan in the air conditioning apparatus of Embodiment 3. 実施の形態４にかかる空気調和装置の構成例を示す図The figure which shows the structural example of the air conditioning apparatus concerning Embodiment 4. FIG. 実施の形態４の室外機の室外制御基板の各構成要素の配置例を示す図The figure which shows the example of arrangement | positioning of each component of the outdoor control board of the outdoor unit of Embodiment 4. 実施の形態４の室内機の構造の一例を示す図The figure which shows an example of the structure of the indoor unit of Embodiment 4.

以下に、本発明の実施の形態にかかる室外機および空気調和装置を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。   Hereinafter, an outdoor unit and an air conditioner according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

実施の形態１．
図１は、本発明の実施の形態１にかかる空気調和装置の構成例を示す図である。図１に示すように、本実施の形態の空気調和装置は、空気調和の対象となる空間に設置される室内機１と、空気調和の対象となる空間外に設置される室外機２を備える。室内機１と室外機２は、冷媒配管、電源線および通信線で接続される。 Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration example of an air-conditioning apparatus according to Embodiment 1 of the present invention. As shown in FIG. 1, the air conditioning apparatus of this Embodiment is provided with the indoor unit 1 installed in the space used as the object of air conditioning, and the outdoor unit 2 installed outside the space used as the object of air conditioning. . The indoor unit 1 and the outdoor unit 2 are connected by refrigerant piping, a power supply line, and a communication line.

図１に示すように、室外機２は、交流電源１６に接続され、圧縮機３と、室外ファン４と、圧縮機３と室外ファン４を制御する室外制御基板５と、圧縮機３内部に設置される圧縮機モータ１２と、室外ファン４に接続され室外ファン４を駆動する室外ファンモータ１３と、交流電源１６と室外制御基板５との間に接続され高調波電流を抑制するリアクタ７と、を備える。なお、圧縮機モータ１２は圧縮機３内部に設置されるが、図１では別の構成要素として示している。また、図１では、リアクタ７が交流電源１６と整流部１７の間に備えられているが、リアクタ７は整流部１７とコンデンサ６の間に備えられてもよい。図１では、室外制御基板５には、交流電源１６から供給される交流電圧を直流電圧に整流する整流部１７と、直流電圧を３相交流電圧に変換して室外ファンモータ１３および圧縮機モータ１２へ印加する電力変換部１１と、整流された直流電圧を平滑化するコンデンサ６と、コンデンサ６の周囲の温度を検出する温度検出部であるコンデンサ周囲温度検出部１４と、電力変換部１１を制御することにより室外ファンモータ１３および圧縮機モータ１２を制御する制御部１０と、が実装される。電力変換部１１は、ワイドバンドギャップ半導体等で構成されるスイッチング素子を備える。ワイドバンドギャップ半導体は、耐電圧性が高く、許容電流密度も高いため、素子の小型化が可能であり、これら小型化された素子を用いることにより、これらの素子を組み込んだ半導体モジュールの小型化が可能となる。また耐熱性も高いため、ヒートシンクの放熱フィンの小型化や、水冷部の空冷化が可能であるので、半導体モジュールの一層の小型化が可能になる。更に電力損失が低いため、素子の高効率化が可能であり、延いては半導体モジュールの高効率化が可能になる。ワイドバンドギャップ半導体としては、炭化珪素、窒化ガリウム系材料またはダイヤモンド等がある。なお、図１では、筐体等の構造物の図示を省略している。   As shown in FIG. 1, the outdoor unit 2 is connected to an AC power source 16, and includes a compressor 3, an outdoor fan 4, an outdoor control board 5 that controls the compressor 3 and the outdoor fan 4, and the compressor 3. A compressor motor 12 installed; an outdoor fan motor 13 connected to the outdoor fan 4 for driving the outdoor fan 4; a reactor 7 connected between the AC power supply 16 and the outdoor control board 5 for suppressing harmonic currents; . In addition, although the compressor motor 12 is installed in the compressor 3, it has shown as another component in FIG. In FIG. 1, the reactor 7 is provided between the AC power supply 16 and the rectifying unit 17, but the reactor 7 may be provided between the rectifying unit 17 and the capacitor 6. In FIG. 1, the outdoor control board 5 includes a rectifying unit 17 that rectifies an AC voltage supplied from an AC power supply 16 into a DC voltage, and an outdoor fan motor 13 and a compressor motor that convert the DC voltage into a three-phase AC voltage. The power converter 11 applied to the capacitor 12, the capacitor 6 that smoothes the rectified DC voltage, the capacitor ambient temperature detector 14 that is a temperature detector that detects the ambient temperature of the capacitor 6, and the power converter 11 A control unit 10 that controls the outdoor fan motor 13 and the compressor motor 12 is mounted by controlling. The power conversion unit 11 includes a switching element made of a wide band gap semiconductor or the like. Wide bandgap semiconductors have high voltage resistance and high permissible current density, so it is possible to reduce the size of the elements. By using these reduced elements, semiconductor modules incorporating these elements can be reduced in size. Is possible. Further, since the heat resistance is high, the heat radiation fins of the heat sink can be downsized and the water cooling part can be air cooled, so that the semiconductor module can be further downsized. Furthermore, since the power loss is low, it is possible to increase the efficiency of the element, and further increase the efficiency of the semiconductor module. Examples of the wide band gap semiconductor include silicon carbide, a gallium nitride-based material, and diamond. In FIG. 1, illustration of structures such as a housing is omitted.

また、図２は、本実施の形態の空気調和装置の室外機２の断面の一例を示す概念図である。図２は、室外機２の各構成要素の配置の一例を示すものであり、各構成要素の実際の大きさが示されているものではない。図２では、各構成要素は、適宜縮小拡大されて図示されている。図２に示すように、室外機２は、図１に示したように、圧縮機３と、室外制御基板５と、室外制御基板５に実装されたコンデンサ６および電力変換部１１と、リアクタ７とを備える。なお、図２では、図１に示した構成要素のうちの一部を図示している。さらに、室外機２は、図２に示すように、室外機２の筐体１５と、圧縮機３等が配置される空間である機械室８と、筐体１５に設けられ、室外ファン４が回転したときに室外ファン４の回転により外気を機械室８内に取り込むための吸入口等である吸引排出機構９とを備える。また、図２では図示していないが筐体１５には、室外機２内の空気を排出する排出口等が設けられている。   Moreover, FIG. 2 is a conceptual diagram which shows an example of the cross section of the outdoor unit 2 of the air conditioning apparatus of this Embodiment. FIG. 2 shows an example of the arrangement of each component of the outdoor unit 2, and the actual size of each component is not shown. In FIG. 2, each component is illustrated by being appropriately reduced and enlarged. As shown in FIG. 2, the outdoor unit 2 includes a compressor 3, an outdoor control board 5, a capacitor 6 and a power conversion unit 11 mounted on the outdoor control board 5, and a reactor 7, as shown in FIG. 1. With. In FIG. 2, some of the components shown in FIG. 1 are illustrated. Further, as shown in FIG. 2, the outdoor unit 2 is provided in the casing 15 of the outdoor unit 2, the machine room 8 that is a space in which the compressor 3 and the like are disposed, and the casing 15. A suction / discharge mechanism 9 which is a suction port or the like for taking outside air into the machine room 8 by rotation of the outdoor fan 4 when it rotates is provided. In addition, although not shown in FIG. 2, the housing 15 is provided with a discharge port or the like for discharging the air in the outdoor unit 2.

本実施の形態では、空気調和装置は、室外ファン４の運転モードとして、室外ファン４が停止している停止モードと、空気調和装置としての通常の運転を行う通常運転モードと、室外ファン４により空気を循環させることにより室外制御基板５の実装部品を冷却する保護運転を行う保護運転モードとの３つを有する。以降、室外ファン４の運転モードをファン運転モードという。なお、上述した３つの運転モードは、室外ファン４単独の運転モードであり、空気調和装置としての通常の運転中であっても、室外ファン４の運転モードは、通常運転モードだけでなく停止モードともなり得る。   In the present embodiment, the air conditioner includes, as the operation mode of the outdoor fan 4, a stop mode in which the outdoor fan 4 is stopped, a normal operation mode in which a normal operation as the air conditioner is performed, and the outdoor fan 4. There are three modes: a protection operation mode in which a protection operation is performed to cool the components mounted on the outdoor control board 5 by circulating air. Hereinafter, the operation mode of the outdoor fan 4 is referred to as a fan operation mode. The three operation modes described above are the operation modes of the outdoor fan 4 alone, and the operation mode of the outdoor fan 4 is not only the normal operation mode but also the stop mode even during the normal operation as the air conditioner. Can be a friend.

空気調和装置としての通常の運転中は、制御部１０は、電力変換部１１を介して、室外ファンモータ１３および圧縮機モータ１２の動作を制御している。すなわち、空気調和装置としての通常の運転中は、制御部１０は、圧縮機３および室外ファン４を運転させている。空気調和装置としての通常の運転中における、制御部１０の室外ファンモータ１３および圧縮機モータ１２の制御方法はどのような方法を用いてもよく、一般的な制御方法が適用可能であるため空気調和装置としての通常の運転中の詳細な説明は省略する。   During normal operation as an air conditioner, the control unit 10 controls the operations of the outdoor fan motor 13 and the compressor motor 12 via the power conversion unit 11. That is, during normal operation as an air conditioner, the control unit 10 operates the compressor 3 and the outdoor fan 4. During the normal operation as the air conditioner, any control method may be used for the outdoor fan motor 13 and the compressor motor 12 of the control unit 10, and since a general control method is applicable, air Detailed description during normal operation as a harmony device is omitted.

保護運転モードでは、圧縮機３の運転は停止させるが、室外ファン４を運転させることにより、吸引排出機構９から機械室８へ外気を取り込み、機械室８内の室外制御基板５の実装部品を冷却する。以降、通常運転モードの室外ファン４の回転数を通常回転数とよび、保護運転モードの室外ファン４の回転数を保護回転数とよぶ。保護回転数については後述する。   In the protection operation mode, the operation of the compressor 3 is stopped, but by operating the outdoor fan 4, the outside air is taken into the machine room 8 from the suction / discharge mechanism 9 and the components mounted on the outdoor control board 5 in the machine room 8 are removed. Cooling. Hereinafter, the rotation speed of the outdoor fan 4 in the normal operation mode is referred to as normal rotation speed, and the rotation speed of the outdoor fan 4 in the protection operation mode is referred to as protection rotation speed. The protection rotation speed will be described later.

本実施の形態では、制御部１０は、ファン運転モードを示すフラグとしてファン運転モードフラグを用いてファン運転モードを管理する。ここでは、一例として、ファン運転モードフラグが０の場合は停止モードを示し、ファン運転モードフラグが１の場合は通常運転モードを示し、ファン運転モードフラグが２の場合は保護運転モードを示すとする。なお、ファン運転モードフラグの初期値は０に設定されている。ファン運転モードフラグの値とモードの対応は、この例に限定されない。   In the present embodiment, the control unit 10 manages the fan operation mode using the fan operation mode flag as a flag indicating the fan operation mode. Here, as an example, when the fan operation mode flag is 0, the stop mode is indicated, when the fan operation mode flag is 1, the normal operation mode is indicated, and when the fan operation mode flag is 2, the protection operation mode is indicated. To do. The initial value of the fan operation mode flag is set to 0. The correspondence between the value of the fan operation mode flag and the mode is not limited to this example.

また、室内機１は、図示しないリモートコントローラまたは室内機１本体の入力部からのユーザーからの通常運転モードの開始または終了、すなわち空気調和装置の運転開始または運転終了の指示を受け付ける。そして、室内機１は、受け付けた指示に基づいて室外機２へ空気調和装置の運転開始または運転終了を示す信号を送信する。室外機２の制御部１０は、空気調和装置の運転開始または運転終了を指示する信号を、室内機１から受信する。制御部１０は、室内機１から空気調和装置の運転開始を示す信号を受信すると圧縮機３の制御を開始する。空気調和装置としての通常の運転中では、制御部１０は室内機１が設置された空間の状態に応じて圧縮機３を運転させたり停止させたりの制御を行う。   In addition, the indoor unit 1 receives an instruction to start or end a normal operation mode, that is, an operation start or an operation end of the air conditioner, from a remote controller (not shown) or an input unit of the main body of the indoor unit 1. Then, the indoor unit 1 transmits a signal indicating the start or end of the operation of the air conditioner to the outdoor unit 2 based on the received instruction. The control unit 10 of the outdoor unit 2 receives from the indoor unit 1 a signal that instructs to start or end the operation of the air conditioner. The control part 10 will start control of the compressor 3, if the signal which shows the driving | operation start of an air conditioning apparatus from the indoor unit 1 is received. During normal operation as an air conditioner, the control unit 10 controls whether the compressor 3 is operated or stopped according to the state of the space in which the indoor unit 1 is installed.

図３は、本実施の形態の空気調和装置における室外ファン４の制御手順の一例を示すフローチャートである。また、制御部１０は、室外ファン４の保護運転している時間をカウントするためのカウンタである保護運転時間カウンタを有するが、保護運転時間カウンタは初期状態では停止しているとする。   FIG. 3 is a flowchart illustrating an example of a control procedure for the outdoor fan 4 in the air-conditioning apparatus according to the present embodiment. Further, the control unit 10 has a protective operation time counter that is a counter for counting the time during which the outdoor fan 4 is in the protective operation, and it is assumed that the protective operation time counter is stopped in the initial state.

制御部１０は、電源が投入されてから、電源が落とされるまでの間は、図３に示す動作を一定周期で実施する。まず、制御部１０は圧縮機３が運転中であるか否かを判断し（ステップＳ１）、運転中でない場合（ステップＳ１ Ｎｏ）、ファン運転モードフラグが１であるか否かを判断する（ステップＳ２）。   The control unit 10 performs the operation shown in FIG. 3 at a constant period after the power is turned on until the power is turned off. First, the control unit 10 determines whether or not the compressor 3 is in operation (step S1), and if not (in step S1 No), determines whether or not the fan operation mode flag is 1 (step S1). Step S2).

ファン運転モードが１でない場合（ステップＳ２ Ｎｏ）、すなわち室外ファン４が停止モードまたは保護運転モードの場合、制御部１０はファン運転モードフラグが２であるか否かを判断する（ステップＳ３）。ファン運転モードフラグが２でない場合（ステップＳ３ Ｎｏ）、制御部１０はコンデンサ周囲温度検出部１４からコンデンサ周囲温度検出部１４により検出されたコンデンサ６の周囲の温度を取得し、コンデンサ６の周囲の温度があらかじめ設定された閾値Ｔｃ１より小さいか否かを判断する（ステップＳ４）。ステップＳ４で、コンデンサ６の周囲の温度がＴｃ１より小さいと判断した場合（ステップＳ４ Ｙｅｓ）、処理を終了する。   When the fan operation mode is not 1 (step S2 No), that is, when the outdoor fan 4 is in the stop mode or the protection operation mode, the control unit 10 determines whether the fan operation mode flag is 2 (step S3). When the fan operation mode flag is not 2 (No in step S3), the control unit 10 acquires the ambient temperature of the capacitor 6 detected by the capacitor ambient temperature detection unit 14 from the capacitor ambient temperature detection unit 14, and It is determined whether or not the temperature is lower than a preset threshold value Tc1 (step S4). If it is determined in step S4 that the temperature around the capacitor 6 is lower than Tc1 (Yes in step S4), the process ends.

なお、Ｔｃ１は、コンデンサ６の定格の温度、すなわち定格として許容温度範囲の最大値としても良いし、コンデンサ６の寿命を考慮して、定格の温度よりも低い温度を設定しても良い。また、室外制御基板５上には、コンデンサ６以外にも許容温度が低い電装部品がある場合、コンデンサ６より許容温度が低い電装部品の許容温度に基づいてＴｃ１を決定してもよい。コンデンサ６は温度が高ければ高いほど寿命が短くなることから、コンデンサ６に注目してコンデンサ６の温度を許容温度範囲の最大値より低く保つことで、コンデンサ６の交換頻度を低下させ低コスト化を実現できる。   Note that Tc1 may be a rated temperature of the capacitor 6, that is, a maximum value of the allowable temperature range as a rating, or a temperature lower than the rated temperature may be set in consideration of the life of the capacitor 6. If there is an electrical component having a lower allowable temperature besides the capacitor 6 on the outdoor control board 5, Tc <b> 1 may be determined based on the allowable temperature of the electrical component whose allowable temperature is lower than that of the capacitor 6. The higher the temperature, the shorter the life of the capacitor 6. Therefore, paying attention to the capacitor 6 and keeping the temperature of the capacitor 6 lower than the maximum value in the allowable temperature range, the replacement frequency of the capacitor 6 is reduced and the cost is reduced. Can be realized.

また、ステップＳ４で、コンデンサ６の周囲の温度がＴｃ１以上であると判断した場合（ステップＳ４ Ｎｏ）、制御部１０は室外ファン４の動作を開始させ（ステップＳ５）、室外ファン４の回転数を、保護運転モードの回転数である保護回転数に設定する（ステップＳ６）。そして、制御部１０は、ファン運転モードフラグを２とするとともに（ステップＳ７）、保護運転時間カウンタにより保護運転時間のカウントを開始し（ステップＳ８）、処理を終了する。なお、保護運転時間は、保護運転モードの継続時間を示す。   When it is determined in step S4 that the temperature around the capacitor 6 is equal to or higher than Tc1 (No in step S4), the control unit 10 starts the operation of the outdoor fan 4 (step S5), and the rotational speed of the outdoor fan 4 Is set to the protection rotational speed which is the rotational speed in the protection operation mode (step S6). Then, the control unit 10 sets the fan operation mode flag to 2 (step S7), starts counting the protected operation time with the protected operation time counter (step S8), and ends the process. The protected operation time indicates the duration of the protected operation mode.

また、ステップＳ３で、ファン運転モードフラグが２であると判断した場合（ステップＳ３ Ｙｅｓ）、すなわち保護運転モードである場合、ステップＳ９へ進む。ステップＳ９では、制御部１０は、保護運転時間カウンタ値すなわち保護運転時間カウンタのカウンタ値が閾値ｔ１より小さいか否かを判断する（ステップＳ９）。   Further, when it is determined in step S3 that the fan operation mode flag is 2 (Yes in step S3), that is, in the protection operation mode, the process proceeds to step S9. In step S9, the control unit 10 determines whether or not the protected operation time counter value, that is, the counter value of the protected operation time counter is smaller than the threshold value t1 (step S9).

保護運転時間カウンタ値がｔ１より小さいと判断した場合（ステップＳ９ Ｙｅｓ）、処理を終了する。保護運転時間カウンタ値がｔ１以上であると判断した場合（ステップＳ９ Ｎｏ）、制御部１０は、保護運転時間カウンタをクリアする（ステップＳ１０）。また、制御部１０は、室外ファン４を停止させ（ステップＳ１１）、ファン運転モードフラグを０に設定し（ステップＳ１２）、処理を終了する。   When it is determined that the protected operation time counter value is smaller than t1 (Yes in step S9), the process is terminated. When it is determined that the protected operation time counter value is equal to or greater than t1 (No in step S9), the control unit 10 clears the protected operation time counter (step S10). Moreover, the control part 10 stops the outdoor fan 4 (step S11), sets a fan operation mode flag to 0 (step S12), and complete | finishes a process.

ステップＳ２で、ファン運転モードフラグが１であると判断した場合（ステップＳ２ Ｙｅｓ）、室外ファン４を停止させ（ステップＳ１３）、ファン運転モードフラグを０に設定し（ステップＳ１４）、処理を終了する。   If it is determined in step S2 that the fan operation mode flag is 1 (step S2 Yes), the outdoor fan 4 is stopped (step S13), the fan operation mode flag is set to 0 (step S14), and the process is terminated. To do.

ステップＳ１で、圧縮機３が運転中であると判断した場合（ステップＳ１ Ｙｅｓ）、制御部１０は、ファン運転モードフラグが１であるか否かを判断する（ステップＳ１５）。ファン運転モードフラグが１でないと判断した場合（ステップＳ１５ Ｎｏ）、ファン運転モードフラグが０であるか否かを判断する（ステップＳ１６）。ファン運転モードフラグが０でないと判断した場合（ステップＳ１６ Ｎｏ）、制御部１０は、保護運転時間カウンタをクリアする（ステップＳ１７）。また、制御部１０は、室外ファン４の回転数を通常回転数に設定し（ステップＳ１８）、ファン運転モードフラグを１に設定し（ステップＳ１９）、処理を終了する。   When it is determined in step S1 that the compressor 3 is operating (Yes in step S1), the control unit 10 determines whether or not the fan operation mode flag is 1 (step S15). When it is determined that the fan operation mode flag is not 1 (No in step S15), it is determined whether or not the fan operation mode flag is 0 (step S16). When it is determined that the fan operation mode flag is not 0 (No at Step S16), the control unit 10 clears the protection operation time counter (Step S17). Moreover, the control part 10 sets the rotation speed of the outdoor fan 4 to normal rotation speed (step S18), sets a fan operation mode flag to 1 (step S19), and complete | finishes a process.

ステップＳ１５で、ファン運転モードフラグが１であると判断した場合（ステップＳ１５ Ｙｅｓ）、処理を終了する。ステップＳ１６で、ファン運転モードフラグが０であると判断した場合（ステップＳ１６ Ｙｅｓ）、制御部１０は、室外ファン４の動作を開始させる（ステップＳ２０）。そして、制御部１０は、室外ファン４の回転数を通常回転数に設定し（ステップＳ２１）、ファン運転モードフラグを１に設定し（ステップＳ２２）、処理を終了する。上述したように、以上の処理を一定周期で実施する。   If it is determined in step S15 that the fan operation mode flag is 1 (Yes in step S15), the process ends. When it is determined in step S16 that the fan operation mode flag is 0 (step S16 Yes), the control unit 10 starts the operation of the outdoor fan 4 (step S20). And the control part 10 sets the rotation speed of the outdoor fan 4 to normal rotation speed (step S21), sets a fan operation mode flag to 1 (step S22), and complete | finishes a process. As described above, the above processing is performed at a constant cycle.

本実施の形態では、ファン運転モードフラグの初期値は０であり、圧縮機３の運転を開始すると、ステップＳ１、ステップＳ１５、ステップＳ１６、ステップＳ２０−Ｓ２２と進み、室外ファン４は通常回転数で運転されファン運転モードフラグは１に設定される。その後、圧縮機３の運転が停止すると、ステップＳ１、ステップＳ２、ステップＳ１３、ステップＳ１４と進み、室外ファン４は停止されファン運転モードフラグは０に設定される。その後、一定周期後に図３の処理が行われると、ステップＳ１、ステップＳ２、ステップＳ３、ステップＳ４と進み、コンデンサ６の周囲の温度がＴｃ１以上の場合、ステップＳ５、ステップＳ６、ステップＳ７、ステップＳ８へと進み、室外ファン４は保護回転数で回転を開始し、保護運転モードとなり保護運転時間の計測が開始される。その後、保護運転時間がｔ１以上となると、制御部１０は室外ファン４を停止させる。   In the present embodiment, the initial value of the fan operation mode flag is 0. When the operation of the compressor 3 is started, the operation proceeds to step S1, step S15, step S16, and steps S20 to S22, and the outdoor fan 4 is operated at the normal rotation speed. The fan operation mode flag is set to 1. Thereafter, when the operation of the compressor 3 is stopped, the process proceeds to step S1, step S2, step S13, and step S14, the outdoor fan 4 is stopped, and the fan operation mode flag is set to zero. Thereafter, when the processing of FIG. 3 is performed after a certain period, the process proceeds to step S1, step S2, step S3, and step S4. When the ambient temperature of the capacitor 6 is equal to or higher than Tc1, step S5, step S6, step S7, step Proceeding to S8, the outdoor fan 4 starts to rotate at the protection rotational speed, enters the protection operation mode, and starts measuring the protection operation time. Thereafter, when the protection operation time becomes t1 or more, the control unit 10 stops the outdoor fan 4.

すなわち、本実施の形態では、制御部１０は、圧縮機３の運転が停止すると一旦室外ファン４を停止させ、一定周期でコンデンサ６の周囲の温度がＴｃ１未満であるか否かを判断し、コンデンサ６の周囲の温度がＴｃ１以上となると室外ファン４を保護回転数で回転させる。そして、保護運転時間がｔ１以上となると室外ファン４を停止させる。   That is, in this embodiment, when the operation of the compressor 3 stops, the control unit 10 stops the outdoor fan 4 once, determines whether or not the temperature around the capacitor 6 is lower than Tc1 at a constant period, When the temperature around the condenser 6 becomes equal to or higher than Tc1, the outdoor fan 4 is rotated at the protective rotational speed. Then, when the protection operation time becomes t1 or more, the outdoor fan 4 is stopped.

図４は、本実施の形態の室外ファン４の回転数の推移の一例を示す図である。図４の横軸は時間を示し、図４の上段には、リアクタ７の温度１０１、コンデンサ周囲温度１０２、外気温１０３を示している。図４では、外気温１０３がＴ３である例を示している。図４の下段には、圧縮機３の回転数と室外ファン４の回転数を示している。回転数１０４は、通常運転モードにおける圧縮機３の回転数を示し、回転数１０５は、室外ファン４の通常回転数すなわち通常運転モードにおける室外ファン４の回転数を示し、回転数１０６，１０７は、室外ファン４の保護回転数すなわち保護運転モードにおける室外ファン４の回転数を示す。   FIG. 4 is a diagram illustrating an example of a change in the rotational speed of the outdoor fan 4 according to the present embodiment. The horizontal axis of FIG. 4 indicates time, and the upper part of FIG. 4 indicates the temperature 101 of the reactor 7, the condenser ambient temperature 102, and the outside air temperature 103. FIG. 4 shows an example in which the outside air temperature 103 is T3. The lower part of FIG. 4 shows the rotational speed of the compressor 3 and the rotational speed of the outdoor fan 4. The rotation speed 104 indicates the rotation speed of the compressor 3 in the normal operation mode, the rotation speed 105 indicates the normal rotation speed of the outdoor fan 4, that is, the rotation speed of the outdoor fan 4 in the normal operation mode, and the rotation speeds 106 and 107 are The protection rotation speed of the outdoor fan 4, that is, the rotation speed of the outdoor fan 4 in the protection operation mode is shown.

図４に示すように、本実施の形態では、圧縮機３の回転が停止すると、制御部１０は、一旦室外ファン４は停止させ、コンデンサ周囲温度１０２がＴｃ１未満の間は室外ファン４を停止させたままとする。そして、コンデンサ周囲温度１０２が上昇してＴｃ１になると、制御部１０は室外ファン４を保護回転数で回転させ、保護運転時間がｔ１になると室外ファン４を停止させる。そして、再びコンデンサ周囲温度１０２が上昇してＴｃ１になると制御部１０は室外ファン４を保護回転数で回転させ、保護運転時間がｔ１になると室外ファン４を停止させる。   As shown in FIG. 4, in the present embodiment, when the rotation of the compressor 3 stops, the control unit 10 stops the outdoor fan 4 and stops the outdoor fan 4 while the condenser ambient temperature 102 is lower than Tc1. Leave it alone. Then, when the capacitor ambient temperature 102 rises to Tc1, the control unit 10 rotates the outdoor fan 4 at the protective rotational speed, and stops the outdoor fan 4 when the protective operation time reaches t1. When the condenser ambient temperature 102 rises again to Tc1, the control unit 10 rotates the outdoor fan 4 at the protective rotational speed, and stops the outdoor fan 4 when the protective operation time reaches t1.

ここで、本実施の形態の空気調和装置において、圧縮機３が停止した場合、一旦室外ファン４を停止させてからコンデンサ６の温度がＴｃ１未満であるか否かを判断する理由について説明する。室外ファン４の運転時は、室外ファン４の吸引により吸引排出機構９から外気が機械室８内に取り込まれ、コンデンサ６は冷やされているため、コンデンサ６の温度がＴｃ１未満であるため室外制御基板５を冷却する必要はないと判断して、室外ファン４を停止させることになる。しかしながら、室外機２の機械室８の低耐熱の電装部品にとっては室外ファン４が回転している時より、室外ファン４が回転していない時の方が、温度が上昇する可能性が高い。室外機２には、高耐熱のワイドバンドギャップ半導体を備える電力変換部１１が実装され、また室外制御基板５の周辺には高耐熱のリアクタ７が配置される。室外ファン４を停止させると、ワイドバンドギャップ半導体およびリアクタ７より低耐熱の電装部品には、高耐熱のワイドバンドギャップ半導体およびリアクタ７から熱エネルギーが流入し、低耐熱の電装部品の温度が上昇する。また、近年、空気調和装置の室外機２では、省エネ、小型化の観点から、機械室８の小型化、高密度化が進んでいる。このため、機械室８では熱がこもりやすく、温度が上昇しやすくなっている。   Here, in the air conditioner of the present embodiment, the reason for determining whether or not the temperature of the capacitor 6 is lower than Tc1 after the outdoor fan 4 is once stopped when the compressor 3 is stopped will be described. When the outdoor fan 4 is in operation, since the outside air is taken into the machine room 8 by the suction of the outdoor fan 4 and the condenser 6 is cooled, the outdoor control is performed because the temperature of the condenser 6 is lower than Tc1. It is determined that there is no need to cool the substrate 5, and the outdoor fan 4 is stopped. However, for the low heat resistant electrical component of the machine room 8 of the outdoor unit 2, the temperature is more likely to rise when the outdoor fan 4 is not rotating than when the outdoor fan 4 is rotating. In the outdoor unit 2, a power conversion unit 11 including a high heat-resistant wide bandgap semiconductor is mounted, and a high heat-resistant reactor 7 is disposed around the outdoor control board 5. When the outdoor fan 4 is stopped, heat energy flows from the wide band gap semiconductor and the reactor 7 having a lower heat resistance than the wide band gap semiconductor and the reactor 7, and the temperature of the low heat resistant electrical component rises. To do. In recent years, in the outdoor unit 2 of the air conditioner, the machine room 8 has been downsized and densified from the viewpoint of energy saving and downsizing. For this reason, in the machine room 8, heat tends to be trapped and the temperature is likely to rise.

したがって、室外ファン４を停止させて、コンデンサ６の温度をＴｃ１と比較した方が、室外ファン４を運転中にコンデンサ６の温度をＴｃ１と比較する場合に比べ、より確実に電装部品を許容温度範囲内に保持することができる。   Therefore, when the outdoor fan 4 is stopped and the temperature of the capacitor 6 is compared with Tc1, the temperature of the capacitor 6 can be more reliably compared with the allowable temperature when the temperature of the capacitor 6 is compared with Tc1 while the outdoor fan 4 is operating. Can be kept within range.

また、例えば、圧縮機３および室外ファン４の運転中に、停電が発生し、あるいはユーザーがブレーカーを遮断して、圧縮機３が停止したとする。この後、電源が再投入されると、従来の空気調和装置では、コンデンサ等の周囲の温度が高い場合でも室外ファン４を動作させない。このため、コンデンサの周囲の温度が高くなる恐れがある。これに対し、本実施の形態では、圧縮機３が停止した場合に、コンデンサ６の周囲の温度を検出するようにしているので、停電が発生した場合、またはユーザーがブレーカーを落とした場合に、再起動しても、コンデンサ６の周囲の温度が高い場合には、室外ファン４を起動して冷却する。   Further, for example, it is assumed that a power failure occurs during the operation of the compressor 3 and the outdoor fan 4, or the user shuts off the breaker and the compressor 3 stops. Thereafter, when the power is turned on again, the conventional air conditioner does not operate the outdoor fan 4 even when the ambient temperature of the condenser or the like is high. For this reason, there exists a possibility that the temperature around a capacitor | condenser may become high. On the other hand, in the present embodiment, when the compressor 3 is stopped, the temperature around the capacitor 6 is detected. Therefore, when a power failure occurs or when the user drops the breaker, If the ambient temperature around the condenser 6 is high even after restarting, the outdoor fan 4 is started and cooled.

なお、本実施の形態では、コンデンサ６の周囲の温度を検出するようにしたが、室外制御基板５に実装されたコンデンサ６以外の電装部品の周囲の温度を検出して、温度が閾値以上の場合に室外ファン４を保護運転モードで運転するようにしてもよい。   In the present embodiment, the temperature around the capacitor 6 is detected. However, the temperature around the electrical component other than the capacitor 6 mounted on the outdoor control board 5 is detected, and the temperature is equal to or higher than the threshold value. In this case, the outdoor fan 4 may be operated in the protective operation mode.

以上のように、本実施の形態では、圧縮機３が停止した場合、一旦室外ファン４を停止させてから、コンデンサ６の温度がＴｃ１以上の場合に室外ファン４を一定時間運転するようにした。このため、電装部品の温度の上昇を抑えて耐熱温度未満に保ちつつ、電装部品を冷却するための室外ファン４を必要最小限に運転するようにしたので、消費電力を低減することができるという効果を有する。   As described above, in the present embodiment, when the compressor 3 is stopped, the outdoor fan 4 is once stopped, and then the outdoor fan 4 is operated for a certain time when the temperature of the capacitor 6 is equal to or higher than Tc1. . For this reason, since the outdoor fan 4 for cooling the electrical component is operated to the minimum necessary while suppressing the temperature rise of the electrical component and keeping it below the heat-resistant temperature, the power consumption can be reduced. Has an effect.

また、本実施の形態では、圧縮機３が停止した場合、一旦室外ファン４を停止させてから、コンデンサ６の温度がＴｃ１以上の場合に室外ファン４を一定時間運転するようにしたが、室外ファン４の運転時間すなわち保護運転時間を一定時間としなくてもよい。例えば、圧縮機３が停止した場合、一旦室外ファン４を停止させてから、コンデンサ６の温度がＴｃ１以上の場合に室外ファン４の保護運転モードを開始し、コンデンサ６の温度が、Ｔｃ１より低い温度である継続閾値Ｔｃ２以下となるまで保護運転モードを継続するようにしてもよい。   In the present embodiment, when the compressor 3 is stopped, the outdoor fan 4 is once stopped, and then the outdoor fan 4 is operated for a predetermined time when the temperature of the capacitor 6 is equal to or higher than Tc1. The operation time of the fan 4, that is, the protection operation time may not be a fixed time. For example, when the compressor 3 is stopped, the outdoor fan 4 is once stopped, and then the protection operation mode of the outdoor fan 4 is started when the temperature of the condenser 6 is equal to or higher than Tc1, and the temperature of the condenser 6 is lower than Tc1. You may make it continue protection driving mode until it becomes below the continuation threshold value Tc2 which is temperature.

また、圧縮機３が停止した場合、電装部品の温度が高い場合には、室外ファン４を起動するようにしたので、停電が発生しまたはユーザーがブレーカーを遮断して復帰させた場合にも、電装部品の温度の上昇を抑制することができ、電装部品の故障および寿命の低下を防ぐという効果を有する。   In addition, when the compressor 3 is stopped, when the temperature of the electrical component is high, the outdoor fan 4 is started. Therefore, even when a power failure occurs or the user shuts down the breaker and returns it, An increase in the temperature of the electrical component can be suppressed, and there is an effect of preventing failure of the electrical component and a decrease in the service life.

実施の形態２．
図５は、本発明の実施の形態２にかかる空気調和装置の構成例を示す図である。図５に示すように、本実施の形態の空気調和装置は、室内機１と室外機２ａとを備える。室外機２ａは、実施の形態１の室外制御基板５を室外制御基板５ａに替える以外は、実施の形態１の室外機２と同様である。室内機１と室外機２ａは、冷媒配管、電源線および通信線で接続される。実施の形態１と同様の機能を有する構成要素は、実施の形態１と同一の符号を付して重複する説明を省略する。以下、実施の形態１と異なる部分を説明する。 Embodiment 2. FIG.
FIG. 5 is a diagram illustrating a configuration example of an air-conditioning apparatus according to Embodiment 2 of the present invention. As shown in FIG. 5, the air-conditioning apparatus of the present embodiment includes an indoor unit 1 and an outdoor unit 2a. The outdoor unit 2a is the same as the outdoor unit 2 of the first embodiment except that the outdoor control board 5 of the first embodiment is replaced with the outdoor control board 5a. The indoor unit 1 and the outdoor unit 2a are connected by refrigerant piping, a power supply line, and a communication line. Components having the same functions as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted. Hereinafter, a different part from Embodiment 1 is demonstrated.

室外制御基板５ａは、実施の形態１の室外制御基板５に、交流電源１６から入力される交流電圧の電圧値すなわち電源電圧を検出する電源電圧検出部１８を追加している。本実施の形態の室外ファン４の制御にかかる動作は実施の形態１と同様である。本実施の形態では、さらに、停電が発生した場合に停電割り込み処理を実施する。具体的には、制御部１０は、電源電圧検出部１８が検出した電圧値に基づいて停電またはユーザーによる電源の遮断の有無、すなわち電源の供給の停止の有無を監視し、電源の供給の停止が発生したと判断した場合に、他の処理に割り込んで停電割り込み処理を実施する。   In the outdoor control board 5a, a power supply voltage detection unit 18 that detects a voltage value of an AC voltage input from the AC power supply 16, that is, a power supply voltage, is added to the outdoor control board 5 of the first embodiment. The operation relating to the control of the outdoor fan 4 of the present embodiment is the same as that of the first embodiment. In the present embodiment, a power failure interruption process is further performed when a power failure occurs. More specifically, the control unit 10 monitors the power supply voltage detection unit 18 for the presence or absence of a power failure or the interruption of the power supply by the user, that is, the power supply stoppage, and stops the power supply supply. If it is determined that a power failure has occurred, interrupt the other process and execute the power failure interrupt process.

図６は、本実施の形態の停電割り込み処理手順の一例を示すフローチャートである。制御部１０は圧縮機３の運転中であるか否かを判断する（ステップＳ３１）。圧縮機３が運転中でない場合（ステップＳ３１ Ｎｏ）、制御部１０はファン運転モードフラグが１であるか否かを判断する（ステップＳ３３）。ファン運転モードフラグが１でないと判断した場合（ステップＳ３３ Ｎｏ）、制御部１０は通常の室外ファン４の制御処理、すなわち図３に示した処理に復帰し（ステップＳ３６）、停電割り込み処理を終了する。ステップＳ３１で、圧縮機３が運転中である場合（ステップＳ３１ Ｙｅｓ）、制御部１０は圧縮機３を停止させ（ステップＳ３２）、ステップＳ３３へ進む。   FIG. 6 is a flowchart illustrating an example of a power failure interrupt processing procedure according to the present embodiment. The control unit 10 determines whether or not the compressor 3 is in operation (step S31). When the compressor 3 is not in operation (No at Step S31), the control unit 10 determines whether or not the fan operation mode flag is 1 (Step S33). When it is determined that the fan operation mode flag is not 1 (No at Step S33), the control unit 10 returns to the normal outdoor fan 4 control process, that is, the process shown in FIG. 3 (Step S36), and ends the power failure interrupt process. To do. When the compressor 3 is operating in step S31 (step S31 Yes), the control unit 10 stops the compressor 3 (step S32) and proceeds to step S33.

ステップＳ３３で、ファン運転モードフラグが１であると判断した場合（ステップＳ３３ Ｙｅｓ）、制御部１０は室外ファン４を停止させ（ステップＳ３４）、ファン運転モードフラグを０に設定し（ステップＳ３５）、ステップＳ３６へ進む。   When it is determined in step S33 that the fan operation mode flag is 1 (step S33 Yes), the control unit 10 stops the outdoor fan 4 (step S34) and sets the fan operation mode flag to 0 (step S35). The process proceeds to step S36.

以上のように、本実施の形態では、停電またはユーザーによる電源の遮断が発生した場合に、圧縮機３、室外ファン４を停止させてから、通常の室外ファン４の制御処理を実施する。ここで、停電またはユーザーによる電源の遮断が発生した場合に、圧縮機３、室外ファン４を停止させる理由を説明する。停電またはユーザーによる電源の遮断が発生した場合に、圧縮機３を動作させ続けると、コンデンサ６で平滑化された電圧はすぐ放電され、室外機２ａの全機能が停止してしまう。この場合、コンデンサ６の周囲の温度が上昇してしまう恐れがある。そこで、本実施の形態では、制御部１０は、停電またはユーザーによる電源の遮断が発生したことを検出すると、圧縮機３を停止させた後に通常の室外ファン４の制御処理を実施する。すなわち、コンデンサ６に残されたエネルギーを使用して、コンデンサ６の周囲の温度を検出し、コンデンサ６の周囲の温度がＴｃ１を超えた場合に室外ファン４を動作させて、室外制御基板５ａを冷却する。   As described above, in the present embodiment, when the power failure or the power interruption by the user occurs, the compressor 3 and the outdoor fan 4 are stopped and then the normal control process of the outdoor fan 4 is performed. Here, the reason why the compressor 3 and the outdoor fan 4 are stopped when a power failure or power interruption by the user occurs will be described. If the compressor 3 is continuously operated in the event of a power failure or power interruption by the user, the voltage smoothed by the capacitor 6 is immediately discharged, and all the functions of the outdoor unit 2a are stopped. In this case, the temperature around the capacitor 6 may increase. Therefore, in the present embodiment, when the control unit 10 detects that a power failure or a power interruption by the user has occurred, the control unit 10 performs a normal control process for the outdoor fan 4 after stopping the compressor 3. In other words, the energy remaining in the capacitor 6 is used to detect the temperature around the capacitor 6, and when the temperature around the capacitor 6 exceeds Tc1, the outdoor fan 4 is operated to set the outdoor control board 5a. Cooling.

以上のように、本実施の形態では、停電またはユーザーによる電源の遮断が発生した場合に、圧縮機３を停止させた後に、実施の形態１で述べた室外ファン４の制御処理を行うようにした。このため、停電またはユーザーによる電源の遮断が発生した場合でも、室外ファン４により室外制御基板５ａを冷却することができる。   As described above, in the present embodiment, when the power failure or the power interruption by the user occurs, the control process for the outdoor fan 4 described in the first embodiment is performed after the compressor 3 is stopped. did. For this reason, the outdoor control board 5a can be cooled by the outdoor fan 4 even when a power failure or power interruption by the user occurs.

実施の形態３．
図７は、本発明の実施の形態３にかかる空気調和装置の構成例を示す図である。図７に示すように、本実施の形態の空気調和装置は、室内機１と室外機２ｂとを備える。室外機２ｂは、実施の形態１の室外制御基板５を室外制御基板５ｂに替える以外は、実施の形態１の室外機２と同様である。室内機１と室外機２ｂは、冷媒配管、電源線および通信線で接続される。実施の形態１と同様の機能を有する構成要素は、実施の形態１と同一の符号を付して重複する説明を省略する。以下、実施の形態１と異なる部分を説明する。 Embodiment 3 FIG.
FIG. 7 is a diagram illustrating a configuration example of an air-conditioning apparatus according to Embodiment 3 of the present invention. As shown in FIG. 7, the air-conditioning apparatus of the present embodiment includes an indoor unit 1 and an outdoor unit 2b. The outdoor unit 2b is the same as the outdoor unit 2 of the first embodiment, except that the outdoor control board 5 of the first embodiment is replaced with the outdoor control board 5b. The indoor unit 1 and the outdoor unit 2b are connected by refrigerant piping, a power supply line, and a communication line. Components having the same functions as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted. Hereinafter, a different part from Embodiment 1 is demonstrated.

室外制御基板５ｂは、実施の形態１のコンデンサ周囲温度検出部１４の替わりに、室外制御基板５ｂの表面の温度を検出する温度検出部である基板温度検出部１９を備える以外は、実施の形態１の室外制御基板５と同様である。   The outdoor control board 5b is different from the capacitor ambient temperature detection part 14 of the first embodiment except that it includes a substrate temperature detection part 19 that is a temperature detection part that detects the temperature of the surface of the outdoor control board 5b. 1 is the same as the outdoor control board 5 of FIG.

実施の形態１のコンデンサ周囲温度検出部１４は、コンデンサ６の周囲の温度を検出するために、設置場所に制約があるが、基板温度検出部１９は室外制御基板５ｂ上にどのように配置してもよい。このため、本実施の形態では、コンデンサ周囲温度検出部１４を用いる場合より、配線を短くすることができ低コスト化が可能である。   The capacitor ambient temperature detection unit 14 according to the first embodiment is limited in the installation location in order to detect the temperature around the capacitor 6, but how the substrate temperature detection unit 19 is arranged on the outdoor control board 5b. May be. For this reason, in this Embodiment, compared with the case where the capacitor | condenser ambient temperature detection part 14 is used, wiring can be shortened and cost reduction is possible.

図８は、本実施の形態の空気調和装置における室外ファン４の制御手順の一例を示すフローチャートである。ステップＳ１〜ステップＳ３、ステップＳ５〜ステップＳ２２は、実施の形態１と同様である。本実施の形態では、実施の形態１のステップＳ４の替わりに、以下に示すステップＳ２３を実施する。   FIG. 8 is a flowchart illustrating an example of a control procedure for the outdoor fan 4 in the air-conditioning apparatus of the present embodiment. Steps S1 to S3 and steps S5 to S22 are the same as those in the first embodiment. In the present embodiment, step S23 shown below is performed instead of step S4 of the first embodiment.

ステップＳ２３では、制御部１０は、基板温度検出部１９から基板温度検出部１９が検出した基板温度すなわち室外制御基板５ｂの表面の温度を取得し、基板温度が閾値Ｔｐ１未満であるか否かを判断する（ステップＳ２３）。基板温度がＴｐ１未満であると判断した場合（ステップＳ２３ Ｙｅｓ）、処理を終了し、基板温度がＴｐ１以上であると判断した場合（ステップＳ２３ Ｎｏ）、ステップＳ５へ進む。   In step S23, the control unit 10 acquires the substrate temperature detected by the substrate temperature detection unit 19 from the substrate temperature detection unit 19, that is, the temperature of the surface of the outdoor control substrate 5b, and determines whether or not the substrate temperature is less than the threshold value Tp1. Judgment is made (step S23). If it is determined that the substrate temperature is lower than Tp1 (Yes at Step S23), the process is terminated. If it is determined that the substrate temperature is equal to or higher than Tp1 (No at Step S23), the process proceeds to Step S5.

なお、本実施の形態では、実施の形態１のコンデンサ周囲温度検出部１４の替わりに基板温度検出部１９を備える例を説明したが、同様に、実施の形態２のコンデンサ周囲温度検出部１４の替わりに基板温度検出部１９を用いてもよい。   In the present embodiment, the example in which the substrate temperature detection unit 19 is provided instead of the capacitor ambient temperature detection unit 14 of the first embodiment has been described. Similarly, the capacitor ambient temperature detection unit 14 of the second embodiment has the same structure. Instead, the substrate temperature detector 19 may be used.

以上のように、本実施の形態では、コンデンサ６の周囲の温度の検出の替わりに室外制御基板５ｂの温度を検出するようにした。このため、実施の形態１と同様の効果が得られるとともに、実施の形態１に比べ低コスト化することができる。   As described above, in the present embodiment, the temperature of the outdoor control board 5b is detected instead of detecting the temperature around the capacitor 6. For this reason, the same effect as in the first embodiment can be obtained, and the cost can be reduced as compared with the first embodiment.

また、本実施の形態では、圧縮機３が停止した場合、一旦室外ファン４を停止させてから、基板温度がＴｐ１以上の場合に室外ファン４を一定時間運転するようにしたが、室外ファン４の運転時間すなわち保護運転時間を一定時間としなくてもよい。例えば、圧縮機３が停止した場合、一旦室外ファン４を停止させてから、基板温度がＴｐ１以上の場合に室外ファン４の保護運転モードを開始し、基板温度が、Ｔｐ１より低い温度である継続閾値Ｔｐ２以下となるまで保護運転モードを継続するようにしてもよい。   In the present embodiment, when the compressor 3 is stopped, the outdoor fan 4 is once stopped, and then the outdoor fan 4 is operated for a predetermined time when the substrate temperature is equal to or higher than Tp1. The operation time, i.e., the protection operation time, may not be a fixed time. For example, when the compressor 3 is stopped, the outdoor fan 4 is once stopped, and then the protection operation mode of the outdoor fan 4 is started when the substrate temperature is equal to or higher than Tp1, and the substrate temperature is continuously lower than Tp1. You may make it continue protection driving mode until it becomes below threshold value Tp2.

実施の形態４．
図９は、本発明の実施の形態４にかかる空気調和装置の構成例を示す図である。図９に示すように、本実施の形態の空気調和装置は、室内機１ａと室外機２ｃとを備える。室内機１ａは、ユーザーが室外機２ｃの状態を認識できるように、室外機２ｃの状態を表示する表示部である室内機状態表示部２０を追加する以外は実施の形態３の室内機１と同様である。室外機２ｃは、実施の形態３の室外制御基板５ｂを室外制御基板５ｃに替える以外は、実施の形態３の室外機２ｂと同様である。本実施の形態の室外制御基板５ｃは、室外機２ｃの状態を表示する室外機状態表示部２１を追加する以外は、実施の形態３の室外制御基板５ｂと同様である。室内機１ａと室外機２ｃは、冷媒配管、電源線および通信線で接続される。実施の形態３と同様の機能を有する構成要素は、実施の形態３と同一の符号を付して重複する説明を省略する。以下、実施の形態３と異なる部分を説明する。 Embodiment 4 FIG.
FIG. 9 is a diagram illustrating a configuration example of an air-conditioning apparatus according to Embodiment 4 of the present invention. As shown in FIG. 9, the air conditioning apparatus of the present embodiment includes an indoor unit 1a and an outdoor unit 2c. The indoor unit 1a is the same as the indoor unit 1 of Embodiment 3 except that an indoor unit state display unit 20 that is a display unit that displays the state of the outdoor unit 2c is added so that the user can recognize the state of the outdoor unit 2c. It is the same. The outdoor unit 2c is the same as the outdoor unit 2b of the third embodiment, except that the outdoor control board 5b of the third embodiment is replaced with the outdoor control board 5c. The outdoor control board 5c of the present embodiment is the same as the outdoor control board 5b of the third embodiment except that an outdoor unit state display unit 21 that displays the state of the outdoor unit 2c is added. The indoor unit 1a and the outdoor unit 2c are connected by refrigerant piping, a power supply line, and a communication line. Components having the same functions as those of the third embodiment are denoted by the same reference numerals as those of the third embodiment, and redundant description is omitted. Hereinafter, a different part from Embodiment 3 is demonstrated.

図１０は、本実施の形態の室外機２ｃの室外制御基板５ｃの各構成要素の配置例を示す図である。図１１は、本実施の形態の室内機１ａの構造の一例を示す図である。   FIG. 10 is a diagram illustrating an arrangement example of each component of the outdoor control board 5c of the outdoor unit 2c according to the present embodiment. FIG. 11 is a diagram illustrating an example of the structure of the indoor unit 1a according to the present embodiment.

室外機状態表示部２１は、図１０に示すように、室外制御基板５ｃに実装される。室内機状態表示部２０は、図１１に示すように、室内機１ａのユーザーから認識可能な箇所に設定される。室内機状態表示部２０は、ＬＥＤ（Light Emitting Diode）により室外機２ｃの状態を点滅回数で示すものでも良いし、８セグメントの表示で数値または記号により室外機２ｃの状態を示す表示手段でも良いし、音声により室外機２ｃの状態を示すものでも良い。室外機状態表示部２１としては、ＬＥＤ等を用いることができる。   As shown in FIG. 10, the outdoor unit state display unit 21 is mounted on the outdoor control board 5c. As shown in FIG. 11, the indoor unit state display unit 20 is set at a location that can be recognized by the user of the indoor unit 1a. The indoor unit state display unit 20 may indicate the state of the outdoor unit 2c by LED (Light Emitting Diode) in terms of the number of blinks, or may be display means for indicating the state of the outdoor unit 2c by numerical values or symbols in an 8-segment display. However, the state of the outdoor unit 2c may be indicated by voice. As the outdoor unit state display unit 21, an LED or the like can be used.

次に、本実施の形態の動作について説明する。空気調和装置における室外ファン４の制御手順は、実施の形態３と同様である。本実施の形態では、制御部１０は、保護運転モードを実施している間、室内機１ａへ保護運転モードであることを示す信号を送信する。室内機１ａは、保護運転モードであることを示す信号を受信している間、室内機状態表示部２０により保護運転モードであることを示す。また、制御部１０は、保護運転モードを実施している間、室外機状態表示部２１に保護運転モードであることを示すよう指示し、室外機状態表示部２１は指示に基づいて保護運転モードであることを表示する。   Next, the operation of the present embodiment will be described. The control procedure of the outdoor fan 4 in the air conditioner is the same as that in the third embodiment. In this Embodiment, the control part 10 transmits the signal which shows that it is a protection operation mode to the indoor unit 1a, while implementing the protection operation mode. While the indoor unit 1a receives a signal indicating that it is in the protected operation mode, the indoor unit state display unit 20 indicates that it is in the protected operation mode. Further, the control unit 10 instructs the outdoor unit state display unit 21 to indicate that it is in the protective operation mode while the protective operation mode is being performed, and the outdoor unit state display unit 21 performs the protective operation mode based on the instruction. Is displayed.

以上のように、本実施の形態では、保護運転モードの実行中に、空気調和装置の室内機１ａおよび室外制御基板５ｃにおいて、保護運転モードであることを表示するようにした。このため、ユーザーが空気調和装置を停止させた後に、室外ファン４が動作していることを認識して、誤動作または故障と誤認することを防ぐことができる。   As described above, in the present embodiment, during the execution of the protection operation mode, the indoor operation unit 1a and the outdoor control board 5c of the air conditioner display the protection operation mode. For this reason, it is possible to prevent the user from recognizing that the outdoor fan 4 is operating after the user has stopped the air-conditioning apparatus and erroneously detecting a malfunction or failure.

なお、本実施の形態では、室内機１ａおよび室外制御基板５ｃの両方で保護運転モードであることを表示するようにしたが、いずれか一方で表示するようにしてもよい。また、実施の形態１または実施の形態２の空気調和装置に室内機状態表示部２０および室外機状態表示部２１を追加して、保護運転モードであることを表示するようにしてもよい。   In the present embodiment, both the indoor unit 1a and the outdoor control board 5c indicate that the operation mode is the protection operation mode. However, either one may be displayed. Further, the indoor unit state display unit 20 and the outdoor unit state display unit 21 may be added to the air conditioner of Embodiment 1 or Embodiment 2 to display that it is in the protected operation mode.

以上の実施の形態に示した構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。   The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

１，１ａ 室内機、２，２ａ，２ｂ，２ｃ 室外機、３ 圧縮機、４ 室外ファン、５，５ａ，５ｂ，５ｃ 室外制御基板、６ コンデンサ、７ リアクタ、８ 機械室、９ 吸引排出機構、１０ 制御部、１１ 電力変換部、１２ 圧縮機モータ、１３ 室外ファンモータ、１４ コンデンサ周囲温度検出部、１５ 筐体、１６ 交流電源、１７ 整流部、１８ 電源電圧検出部、１９ 基板温度検出部、２０ 室内機状態表示部、２１ 室外機状態表示部。   1, 1a indoor unit, 2, 2a, 2b, 2c outdoor unit, 3 compressor, 4 outdoor fan, 5, 5a, 5b, 5c outdoor control board, 6 condenser, 7 reactor, 8 machine room, 9 suction discharge mechanism, DESCRIPTION OF SYMBOLS 10 Control part, 11 Power conversion part, 12 Compressor motor, 13 Outdoor fan motor, 14 Capacitor ambient temperature detection part, 15 Case, 16 AC power supply, 17 Rectification part, 18 Power supply voltage detection part, 19 Substrate temperature detection part, 20 indoor unit state display part, 21 outdoor unit state display part.

Claims (10)

圧縮機、室外ファンおよび室外制御基板を備えた空気調和装置の室外機であって、
前記圧縮機および前記室外ファンを制御する制御部と、
前記室外制御基板に実装された電装部品の周囲の温度を検出する温度検出部と、
電源電圧を検出する電源電圧検出部と、
を備え、
前記制御部は、前記電源電圧検出部が検出した電源電圧に基づいて電源の供給が停止していると判断した場合、前記圧縮機および前記室外ファンを停止させ、前記温度検出部により検出された温度が閾値以上であるか否かを判断し、前記温度検出部により検出された温度が閾値以上であると判断すると、前記圧縮機を運転させている場合の前記室外ファンの回転数より低い回転数である保護回転数で前記室外ファンを動作させることにより空気を循環させて前記室外制御基板を冷却することを特徴とする室外機。 An outdoor unit of an air conditioner including a compressor, an outdoor fan, and an outdoor control board,
A control unit for controlling the compressor and the outdoor fan;
A temperature detection unit for detecting a temperature around an electrical component mounted on the outdoor control board;
A power supply voltage detector for detecting a power supply voltage;
With
When the control unit determines that the supply of power is stopped based on the power supply voltage detected by the power supply voltage detection unit , the control unit stops the compressor and the outdoor fan, and is detected by the temperature detection unit. If it is determined whether the temperature is equal to or higher than a threshold value, and the temperature detected by the temperature detection unit is determined to be equal to or higher than the threshold value, the rotation speed is lower than the rotation speed of the outdoor fan when the compressor is operated. An outdoor unit that cools the outdoor control board by circulating air by operating the outdoor fan at a protection rotational speed that is a number. 前記電装部品は、コンデンサであることを特徴とする請求項１に記載の室外機。   The outdoor unit according to claim 1, wherein the electrical component is a capacitor. 圧縮機、室外ファンおよび室外制御基板を備えた空気調和装置の室外機であって、
前記圧縮機および前記室外ファンを制御する制御部と、
前記室外制御基板の温度を検出する温度検出部と、
電源電圧を検出する電源電圧検出部と、
を備え、
前記制御部は、前記電源電圧検出部が検出した電源電圧に基づいて電源の供給が停止していると判断した場合、前記圧縮機および前記室外ファンを停止させ、前記温度検出部により検出された温度が閾値以上であるか否かを判断し、前記温度検出部により検出された温度が閾値以上であると判断すると、前記圧縮機を運転させている場合の前記室外ファンの回転数より低い回転数である保護回転数で前記室外ファンを動作させることにより空気を循環させて前記室外制御基板を冷却することを特徴とする室外機。 An outdoor unit of an air conditioner including a compressor, an outdoor fan, and an outdoor control board,
A control unit for controlling the compressor and the outdoor fan;
A temperature detector for detecting the temperature of the outdoor control board;
A power supply voltage detector for detecting a power supply voltage;
With
When the control unit determines that the supply of power is stopped based on the power supply voltage detected by the power supply voltage detection unit , the control unit stops the compressor and the outdoor fan, and is detected by the temperature detection unit. If it is determined whether the temperature is equal to or higher than a threshold value, and the temperature detected by the temperature detection unit is determined to be equal to or higher than the threshold value, the rotation speed is lower than the rotation speed of the outdoor fan when the compressor is operated. An outdoor unit that cools the outdoor control board by circulating air by operating the outdoor fan at a protection rotational speed that is a number. 前記制御部は、前記室外機の電源投入後、前記圧縮機および前記室外ファンの運転を開始していない場合に、前記温度検出部により検出された温度が閾値以上であるか否かを判断し、前記温度検出部により検出された温度が閾値以上であると判断すると、前記保護回転数で前記室外ファンを動作させることにより空気を循環させて前記室外制御基板を冷却することを特徴とする請求項１、２または３に記載の室外機。   The controller determines whether the temperature detected by the temperature detector is equal to or higher than a threshold value when the operation of the compressor and the outdoor fan has not started after the outdoor unit is turned on. When it is determined that the temperature detected by the temperature detection unit is equal to or higher than a threshold, the outdoor control board is cooled by circulating air by operating the outdoor fan at the protection rotational speed. Item 4. The outdoor unit according to item 1, 2 or 3. 前記制御部は、前記室外ファンを前記保護回転数で動作させてから一定時間が経過すると、前記室外ファンを停止させた後に前記温度検出部により検出された温度が閾値以上であるか否かを判断し、前記温度検出部により検出された温度が閾値以上であると判断すると、前記室外ファンを前記保護回転数で動作させることを特徴とする請求項１から４のいずれか１つに記載の室外機。   The control unit determines whether or not the temperature detected by the temperature detection unit after stopping the outdoor fan is equal to or greater than a threshold value after a certain period of time has elapsed since the outdoor fan was operated at the protection rotational speed. The determination according to any one of claims 1 to 4, wherein the outdoor fan is operated at the protection rotational speed when it is determined that the temperature detected by the temperature detection unit is equal to or higher than a threshold value. Outdoor unit. 前記制御部は、前記室外ファンを前記保護回転数で動作を開始させると前記温度検出部により検出された温度が前記閾値より低い継続閾値以下となるまで前記室外ファンを前記保護回転数で動作させることを特徴とする請求項１から４のいずれか１つに記載の室外機。   When the control unit starts the operation of the outdoor fan at the protection rotation speed, the control unit operates the outdoor fan at the protection rotation speed until the temperature detected by the temperature detection unit becomes a continuation threshold value lower than the threshold value or less. The outdoor unit according to any one of claims 1 to 4, wherein: 前記室外機の運転状態を示す室外機状態表示部、をさらに備え、
前記室外機状態表示部は、前記室外ファンが前記保護回転数で運転中である場合、前記室外ファンが前記保護回転数で運転中であることを表示することを特徴とする請求項１から６のいずれか１つに記載の室外機。 An outdoor unit state display unit indicating an operation state of the outdoor unit,
The outdoor unit status display unit, when the outdoor fan is operating in the protection rpm, claim 1, wherein the displaying said outdoor fan is operating in the protection rpm 6 The outdoor unit as described in any one of these. ワイドバンドギャップ半導体を用いた素子を有する電力変換部、
を備えることを特徴とする請求項１から７のいずれか１つに記載の室外機。 A power conversion unit having an element using a wide band gap semiconductor;
The outdoor unit according to any one of claims 1 to 7 , further comprising: 請求項１から８のいずれか１つに記載の室外機と、
前記室外機と接続された室内機と、
を備えることを特徴とする空気調和装置。 The outdoor unit according to any one of claims 1 to 8 ,
An indoor unit connected to the outdoor unit;
An air conditioner comprising: 前記室内機は、
前記室外機の運転状態を示す表示部、を備え、
前記表示部は、前記室外ファンが前記保護回転数で運転中である場合、前記室外ファンが前記保護回転数で運転中であることを表示することを特徴とする請求項９に記載の空気調和装置。 The indoor unit is
A display unit indicating an operation state of the outdoor unit,
The air conditioner according to claim 9 , wherein the display unit displays that the outdoor fan is operating at the protective rotational speed when the outdoor fan is operating at the protective rotational speed. apparatus.
JP2014196963A 2014-09-26 2014-09-26 Outdoor unit and air conditioner Expired - Fee Related JP6282208B2 (en)

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